Deleting tagged versions
You can delete any of the tagged versions of the stream by using the Delete button 
Note!
The Delete button is not available if the version has the Current or Scheduled marker. See Version history | Current and Scheduled markers for more information.
Autosaved versions also cannot be deleted. See Version history | Autosaved version for more information.
The Delete button in the Version history panel
When you click the Delete button, you will be prompted to confirm the deletion of the version tag. You cannot undo once the version tag is deleted. Click Delete to confirm the deletion.
The prompt to confirm deleting the version tag
Once the version tag has been deleted successfully, a notification appears.
The notification when a version tag is deleted successfully